Re: Air and Water pressure measurements


John Perry wrote:


Using a Garmin C320 and sampling hundred points (while eliminating some
points) , I can position horizontal locations within a meter. So,
given enough samplings, horizontal positioning is not a problem. In
theory, vertical positioning is at best 10% of horizontal. I don't
even bother to find out how to get that from my C320.

But if vertical DGPS is comparable to horizontal DGPS, you can get
sub-meter precision at least. Maybe even millimeter precision. Does
anyone here have enough knowledge to say?



John Perry

A guy that I drank beer with on Fridays in Austin used COTS GPS
equiptment in at least two projects that needed on the order of
millimeter vertical resolution. One was to help re-position a
subsiding bridge in (perhaps) Edinburgh or Glasgow, and one was to
re-level a rocket sled track. If it is really important, email me and
I'll see if I can get back in touch, if he is busy.

.

Relevant Pages

  • Re: Air and Water pressure measurements
    ... horizontal positioning is not a problem. ... sub-meter precision at least. ... millimeter vertical resolution. ... We can just borrow equipments for the ...
    (sci.electronics.design)
  • Re: Air and Water pressure measurements
    ... horizontal positioning is not a problem. ... millimeter vertical resolution. ... subsiding bridge in Edinburgh or Glasgow, ... We can just borrow equipments for the ...
    (sci.electronics.design)